Lubricating device.



F. DIEHL.

LUBRICATING DEVICE APPLICATION FILED JUNB12,1908.

h3g2}? Q Patented Sept. 3,1912

INVENTOR M r BY ATTORNEY or r FFCE,

FREDERICK DIElI-IL, F ELIZABETH, NEW JERSEY, ASSIGNOR TO DIEHL MANUFAC- TUBING COMPANY, A CORPORATION OF NEW JERSEY.

LUBRICATING DEVICE.

Specification of Letters Patent.

Patented Sept. 3,1912.

Application filed June 12, 1908. Serial No. 438,027.

To all whom it may concern:

Be it known that I, FREDERICK DIEHL, a citizen of the United States, residing at Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Lubricating Devices, of which the following is a specification, reference being had therein to the accoinpanying drawings.

This invention relates to an improvement in lubricating devices designed more particularly for electric motors for special use, such as those employedin electric ceiling fans and those used for driving individual machines, in which the armature-shaft isv vertically disposed; and it has for its object .to insure the distributingof the luhiicating fluid with certainty at all times while the machine is in operation. I

As applied to an electric motor with a vertically arranged rotary armature-shaft, the device comprises a fixed bearing boss uponthe motor casing above the armature provided with a'detachable bushing having near itsiipper-end and in its inner surface on an nulardistrihuting oil groove or recess nvith connected longitudinal grooves to carry the oil therefrom along the shaft, and a longitudinal oilsupply duct connected at thewuppcr end with the annular oil groove or recess and having at its lower'end an outwardly extended inlet orifice terminating in the out-er portion of an annular oil reservoir? fixed upon and rotating with the arn'iatureshaft, and which surrounds the lower end of the bearing sleeve." The bearing boss is provided at its upper end with an oil cavity into which leads an overflow )assage from the distribntingoil recess of the bearin sleeve, which latter is provided upon its outer surface with a flattened portion forming with the adjacent wall of tho bcaringboss an oilthe shaft along which it Works into the reservoir in which the lower end of the bearing sleeve extends. As will be observed, any excessof oil supp y to the oil recess at the top of the bearing sleeve will flow outwardly into the overflow cavity in the top of the bearing boss from which it will gravitate downwardly through the return duct and enter the reservoir.

Other features of the present improvement will be hereinafter explained and set forth in the appended claims.

In the accompanying drawings, Figure 1 is a sectional elevation; representing the up; per portion of an electric-motor embodying the present improvement, and Fig. 2 a-sectional plan of the same taken on the line a; w of Fig. 1. p p

The upper end or cap 1 of the motorframe is provided with a bearing boss 2 in which is removably fitted the cylindrical external surface of the sleeve 3 whose inner surface or bore is fitted to the vertical armature-shaft 4: carrying the armature 5. The shaft 4 is provided adjacent the armature 5 with a boss (iand an adjacent threaded portion 7 to which is litted the internally threaded hub 8 of the annular oibrcservoir 9 shown with convergent and slightly -(Toned upper and lower walls. The top of the reservoir 9 is provided with a reduced portioh having an undercut annular rib 10 allordiug an annular oil receiving recess with a bottom slightly downwardly and inwardly inclined giiwtvilatcs into the bottom of the reservoir when the lilachinc comes to rest. The undercut form of the rib l0 insures that any oil caught in the recess surrounded by it may 1l()l. 0l(0]') over the same and along the exterior of the reservoir downwardly upon the armature coils 5 to cause the injury of the latter. 7

The bearing sleeve is provided upon one side with a longitudinal supply duct 12 extending nearly throughout its lcngrlhand having at its lovvciyoud a lateral opening in which is screwed the inner end of a radial tube 13 whose outer end lslaterally curved to .present an'oil inlct'oijfice at an angle to the periphery of the reservoir 9. As wil the threading of the inner end of the inlet tube into the hearing sleeve permits it l h'e'observed by reference to Fig. 2,

' 20 end of the sleeve.

to assume the full-line position to adapt it to rotation of the shaft in one direction or the dotted-line position to enablejtgto perform its function with a shaft rotating in 5 the opposite direction. For convenience in construction, the tube 13 is preferably formed separately from the sleeve 3, .but as regards its function, it is practically a part ofsuch sleeve, its mouth aflording an orifice of the oil passage therein which is presented in a direction contrary to that of rotation of the shaft;

The inner or bearing surface of the sleeve 3 is provided near its .top with an annular distributi oil groove or cavity 14: connect'ed with the upper end of the sup ly duct 12 and with intersecting diametricailly disposed longitudinal grooves 15 leading from such distributing recess to the'l'ower It will thus be observed that in the rotationdof'the-reservoir with the shaft, a free circiilation of lubricant is provided through theinlet tube 13, supply duct 12, distributing recess; 14 and delivery grooves 15 backto the reservoir. ,The up- 'per endof the bearing boss is provided with a conical depression 16 forming with the reduced conical upper end of the bearing sleeve 3 an overflow cavity; connected by means of the inclined lateral passage 17 recessin the sleeve with the distributing 14. The passage 17 constitutes'acombined vent and inspection aperture through yvhich the attendent is. enabled 0 ascertain whether 5 the oil is in proper circulation through the a distributing system so that just the required quantit of oil may be introduced into the l reservo r to insure circulation without flooding the be ring. Below the lateral oil pas- ;0 sage 17 the exterior of the sleeve 3 is flatted to form with t e adjacent inner surface of the LFearing boss an oil-return duct 18 1 thro gh which any oil overflowing into the cavity 16 from the circulating system is enabled to run down the exterior of the sleeve 3 to the interior of the reservoir 9.

"In ,order to prevent the spreading of the ioillupon the cap 1 of the motor casing, the

-, latter is provided with 9. depending annular so tapering flange 19 which tends to lead the overflow oil moving downwardly along theexterior of the sleeve'3 into the reservoir where it is deposited for circulation. It sometimes happens that the helical than}: of the turning tool upon the shaft is in such direction as tp induce an upward flow of the oil between its surface and that of the bearing in which it is journaled. To insure the efiectiwe operation of the lubricating system under such condition, I therefore sometimes provide a lower distributing cavity 148 at the level of or a little above the inlet tube 13 by means of which oil from the supply duct is delivered at the lower end of the journal from which it may be led upwardly through the. longitudinal provision of two or more of such annular oilgrooves or recesses spaced at intervals along the length of the hearing may be found advantageous, a single distributing groove 14 will ordinarily be found suflicient, and this may be located at either end of the bearing, as the conditions may require, for eiiecfiive lubrication of the journal.

While the abutting faces of the boss 6 and hub 8 of the reservoir 9 may in practice be suitably faced to make an oil-tight joint so as to insure the confinement of the oil to the reservoir without leakage, a suitable washer may be interposed if desired.

The sleeve 3 may be secured in position within the bearing boss-2 by means of a set-screw 20 tapped through the side of the latter and having its point entering a corresponding aperture in the exterior of the the oil reservoir and the bearing is adapted for the oil-circulating system herein-shown' and described. It is-also tobe understood that the present improyement is susceptible of considerable variation in construction and arrangement of parts tram that disclosed herein, and that the invention is not therefore limited to the details of construe-- tion set forth in the foregoing description and shown in the accompanying drawings.

Having thus set forth the nature of the invention, what I claim herein is:

1. A lubricating device comprising a rotary shait carrying an annular oil-reservoir haying overhanging walls, anda finedbear for said shaft having 1ndepen'dentlongi- .tu ina-l pil-supply and retumdncts, the former having a connection with the outer per-T tion of said reservoir, an externai overflow cavity connected with theoii-return duct, an I oil-distributin loove or recess connected with the supp yuct,-anil a longitudinai de livery groove inthe inner bearingsnrface connected with said oil-distributin grceve or recess. 1 v

2. A lubricating devireoomprising a rotary shaft carrying an annhhir oihreservoir. having overhan ing-.wails," hesring hose. having an annular depression affording an.

overflow cavity in its upper end, and a hearing sleeve internally fitted to said shaft and externally fitted within the bearing boss and rovided with a longitudinal oil supply not having a connection with the outer por tion of said reservoir, an oil-distributing groove or recess in the inner surface of said sleeve having a connection with said oilsupply duct, longitudinal oil delivery grooves connected with said distributing groove or recess, and an overflow passage leading from said overflow cavity intermediate said boss and said sleeve into the oilrescrvoir.

3. Alubricating. device comprising a 1'0- tary shaft carrying an annular oil-reservoir having overhanging walls, a bearing boss having an annular depression affording an overflow cavity inits upper end and an inwardly tapering annular flange depending from its lower end, and a bearing sleeve internally fitted to said shaft and externally fitted within the bearing boss and provided with a longitudinal oil-supply ducthaving a connection with the outer portion of said reservoir, an oil-distributing grooveor recess in the inner surface of said sleeve having a connection with said oil-supply duct longitudinal oil-delivery grooves connected with said distributing groove or recess, an overflow passage intennediate the distributing groove or recess and the overflow cavity, and .an overflow passage leading from said overflow cavity into the oil-reservoir. Y

4:. A lubricating device comprising a rotary shaft carrying an annular oil-reservoir having overhanging walls, a bearing boss having an annular depression affording an overflow cavity in its upper end, a bearing sleeve internally fitted to said shaft and externally fitted within the bearing boss and provided with a longitudinal oil supply duct having a connection with the outer portion of said reservoir, an oil-distributing groove or recess in the inner surface of said sleeve having a connection with said oilsupply duct, longitudinal oil delivery grooves connected with said distributing groove or recess, an overflow passage leading from said overflow cavity into the oilreservoir, and means for detachably securing said sleeve within the boss.

i 5. A lubricating devlce comprising a 1'0;

tary shaft, an annular reservoir carried by surface of said sleeve having a connection with said oil-supply duct, longitudinal oildelivery grooves connected with said ,distributing groove or recess, an overflow passage intermediate the distributing groove or recess-and the overflow cavity, and an over flow passage leading from said overflow cavity into the oil-reservoir.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

FREDERICK DIEHL. Witnesses H. A. KonNnMANN, Jr, JosnrH F. JA UiTI-L 

